horstmann h37xl series 2 stuck in gravity mode

[bazzer1]

This is not a removed link but intentionally omitted by the manufacturer
There may be a switch or jumper pins in some models soldered onto this PCB but not in yours unfortunately
It may be possible to add your own but not advised without knowing which pins do what and if there are further components missing inside which is highly likely

yes its looking that way ,oh well thanks for the help i will buy new .

 

[brianmoooore]

Very unlikely that there was a gravity only model produced, since, at a guess, only a very small percentage of installations are gravity.
I expect there was some kind of plastic plug pushed in that hole, and a short piece of wire and soldering iron would solve the problem
Can't advise where to solder that wire though from here though.